Macro

How to create macro using #define is given below:
Already you have know how to assign a value in a variable. You can assign a value like this:
int a;
a=10;
You can assign a variable in other variable like this:
int a, b;
a=10;
b=a;
Here a variable is assigned in b variable through the line b=a; If you want to assign a mathematical equation, you should use #define keyword. Here is a mathematical problem:
f(x)=x^2-60x+4
Now we write a program to calculate f(x) for different value of x through #define keyword.

OUTPUT

x = ? 6
f(x) = 4.000000


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